Rotary pump or motor



C www H. 1. J. JANSSEN.

ROTARY PUMP 0R MOTOR.

APPLICATION FILED OCT. 20. |919.

A Patented Mar. 1, 1921.

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WWII/11111110711111111111!!! /H Ven O/j H. I. I. JANSSEN.

ROTARY PUMP OR MOTOR.

APPLICATION FILED OCT. 20, 1919. v

Patented Mar. 1, 1921.

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/H Ven ZIO/j HENDRIK JAN JACOB JANSSEN, or: sorlfDAM, NETHERLANDS.

Specication of Letters Patent.

ROTARY PUMP OR MOTOR.

Application filed October 20,` 1919. Serial No. 331,992.

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lle it known -that I. HENDRIKJAN JACOB JANssnN, engineer. a subject ot' the Queen of the etherlands. residing at Schiedam, the Netherlands. :203 A 'arande, have i11- vented certain new and useful Improvements in Rotary Pumps or Motors. of which the following is a specification.

The main objects of this invention are to provide an improved form of rotary pump or motor; to provide an improved form and arrangement of the piston and rotor 5 and to pro-vide improved means for supporting said piston so as to cause a relative reciprocation between the rotor and piston during their rotation.

An illustrative embodiment of this in vention is shown in the accompanying drawings, in which- Figure 1 is a longitudinal section of the piston and supporting means.

Fig. 2 is aside elevation of the same.

Fig. 3 is a section taken on the line 3 3 of Fig. 1.

Fig. 4 is a -longitudinal section of the pump Or motor showing the parts 1n their assembled relation.

Fig. 5 is a section taken onthe line 5 5 of Fi 4.

f s shown in the drawings, the improved form of pump or motor comprises a casing 5 in which there is concentrically arranged a rotor T and a piston 13 shiftably supported on said rotor and adapted to rotate therewith about the eccentrically mounted shaft 9.

The. casing 5 is cylindrical in form and is provided with inlet and outlet ports 1 and 2, located at diametrically opposite points. A cover member or plate 8 is bolted or Otherwise detachably secured to the casing to fa cilitate the assemblage and removal of the operating parts. A hub or bearing member 3 is formed On the plate 8 in eccentric relation to the rotor and casing and carries a bushing 4 for supporting the driving shaft 9.

The rotor 7 is of suitable shape to rotatably fit the walls of the casing and is provided with a passage 14 extending therethrough in which the piston is shiftably arranged so that the chambers 14.1 at the ends of the piston between the walls of the casing and the rotor are expanded and contracted as they move 'into communication with the inlet and outlet ports 1 and 2 respectively. An Opening 15 is formed in the Walls of the rotor so as to permit the free rotation ofrthe rotor around the eccentric hub 3.

lhe piston 13 is supported on the inner end of the driving shaft and has a snug sliding nt with the passage 14. lVlien the device 1s used as a pump the shaft driven by a pulley 9.1, or other suitable means imparts a rotary movement to the piston and the rotor, and due to the eccentricity of the hub 3 wlth respect to the rotor and casing, the rotation of the operating parts will cause a relative reciprocation of the piston and rotor 1 11 the direction of the longitudinal dimension of the piston; The length of the piston 1s less than the diameter of the rotor so as to form the hereinbefore described chambers 14.1, and the eccentricity of the rotor and piston is such that during the rotation thereof the chambers 14.1 will be most fully expanded just after passing the inlet port 1 and most fully contracted just before completely passing the outlet port 2.

.The means for slidably supporting the piston on the driving shaft comprises a driving member 10 and a pair of links 11 and 12. The member 10 is keyed to the driving shaft and is secured thereto by a set screw 16. Arms or parts 17 are formed on the member 10 and extend in opposite directions on diametrically opposite sides of the shaft 9. The links are disposedl in substantially parallel spaced relation and extend in Opposite directions one on each side of the driving shaft. The inner ends of the links are pivoted to the member l0 by pins 18, and the outer ends are pivoted to the piston by pins 19.

The operation of the device when used as a pump is substantially as follows:

The piston, which is driven by the eccentrically arranged power shafts 9, imparts a rotary movement to the rotor. As the piston approaches and passes the inlet port 1 moving in the direction of the arrow shown in Fig. 5, the lower end of the piston recedes from the walls of the casing due to the eccentricity of the driving shaft and expands the chamber 14.1, so as to cause a suctlon of fluid in through the port 1. At the same time the chamber 14.1 at the other end is being contracted so that the fluid is forced out through the outlet or discharge port 2.

Although but one specific embodlment of this invention has been herein shownand described, it will be understood that numerratenteu Mar. 1, 1921.

ous details of the construction shown may' be altered or omitted without departin from the spirit of this invention as defined y the following claims.

I claim:

1. A device of the class described comprising a casing having inlet and outlet ports, a rotor arranged 1n said casing and having a radially disposed passage extending therethrough, a driving shaft rotatable in said casing on an axis eccentric to the axis of said rotor, a piston shiftably arranged in said passage and providing expansible and contractible chambers at the ends of said piston, said piston belng rotatable with said rotor about the axis of sald shaft, a driving member rigidly secured to said shaft, a link pivotally mounted on said piston, said link being pivotally connected to said member at a point removed from both of said eccentric axes, whereby said piston is caused to rotate about the axis of said shaft, and means for rotating said shaft so as to cause the rotation of said rotor and piston about their` respective axes and the relative reciprocation of said piston on said rotor so as to expand and contract said chambers to cause an intake and discharge through said ports. v

2. A device of the class described, comprising a casing having inlet and outlet ports, a rotor arranged in said casing and having a radially disposed passage extending therethrough, a driving shaft rotatable in said casing on an axis eccentric to the axis of said rotor, a piston shiftably arranged in 4said passage and providing expansible and contractible chambers at the ends of said piston, said piston being rotatable with said rotor about the axis of said shaft, a driving member rigidly secured to said shaft, a link pivotally mounted on said piston, said link being pivotally connected to said member at a point removed from the axis of rotation of said piston, the distance between said pivotal point of connection and the axis of rotation of said piston being greater than one-half the greatest depth of either of said chambers whereby said piston is caused to rotate about the axis of said shaft, and means for rotatin said shaft so as to cause the rotation o said rotor and piston about their res ective axes and the relative reciprocation o said piston on said rotor so as to expand and contract said chambers to cause an intake and discharge through said ports.

3, A device of the class described comprising a casing having inlet and outlet ports, a rotor arranged in said casing and having a radially dlsposed passage extending therethrough, a driving shaft rotatable in said casing on an axis eccentric to the axis of said rotor, a piston shiftably arran ed in said passage vand providing expansib e and contractible chambers at the ends of said piston, said piston being rotatable with said roto about the axis of said shaft, a driving member rigidly secured to said shaft and having oppositely disposed arms, a pair of links extending in opposite directions and located on opposite sides of said shaft and having their inner ends pivotally connected to the respective arms of said driving member and their outer ends pivotally connected to said piston, and means for rotating said shaft Vso as to cause thel rotation of said rotor and piston about their respective axes and the relative reciprocation of said piston on said rotor, so as to expand and contract said 'chambers to cause an intake and discharge through said ports.

4. A device of the class described, comprising a casing having inlet and outlet ports, a rotor arranged in said casing and having a radially disposed passage extending therethrough, a driving-shaft rotatable in said casing on an axis eccentric to the axis of said rotor, a piston shiftably arranged in said passage and providing expansible andv contractible chambers 'at the ends of said piston, said piston being rotatable with said rotor about the axis of said shaft, a driving member rigidly secured to said shaft and having oppositely disposed arms, a pair of links extending in opposite directions and located on opposite sides of said shaft and having their outer ends pivotally connected to said piston, the inner ends of said links being pivotally connected to the respective arms of said driving member at points removed from the axis of rotation of said piston', the distance between said last-mentioned pivotal points of connection and the axis of rotation of said piston being greater than one-half the greatest depth of either of said chambers, and means for rotating said shaft so as to cause the rotation of said rotor and piston about their respective axes and the relative reciprocation of said piston on said rotor so as to expand and contract said' chambers to cause an intake and discharge through said ports.

In testimony whereof I affix my signature.

HENDRIK .IAN JACOB JANSSEN. 

